For Dual Fan: Low Power Consumption Design Dual Cooling Expericnce, More powerful heat dissipation Very Quiet Cooling Fan, get rid of the fan noisy All of the Fans were Tested by Our Engineer, Very Nice Quality Control Update Thermal Tape Can Make Sure Best Heat Conduction Effect For Aluminium Alloy Case and Heatsink: Perfect suitable for Raspberry Pi 3 Model B+ /3B Big Size Heatsink and Cooling Fan Can Make Sure: More powerful heat dissipation High Quality CNC Aluminium Alloy Case Can Protect your Pi Safe Open Design Can Make Sure Our CNC Case will not effect Wifi Signal Reinforced aluminum material, lightweight and durable, long-lasting stainless Kind reminder: There are 4pcs Thermal Tape in the packing. And two big Thermal Tape are optional, when you use the case for Raspberry Pi 3B+, you just need one Thermal Tape; when you use the case for 3B, you need two Thermal Tapes. Color: As Shown Material: Aluminum Alloy+Plastic Package Contents: 1 * Case set